Sid Wood wrote: > These shrouds are made of steel. One could get carried away > and use the steel shrouds as molds to make fiberglass cooling shrouds to > save some weight. The steel shrouds do fit tight to the heads at the > exhaust outlets. I thought that area would be too hot (1100 F) for > fiberglass/epoxy shrouds, so I am staying with the VW steel shrouds for > contact with the VW heads.
Just FYI, fiberglass and Aeropoxy work fine for those shrouds even when bolted directly to the heads, but they will discolor. They also either need to be stretched around the cylinders or heads or otherwise contrained on the ends by some means such as screws or light aluminum angle (which works great on the Vair's flat shroud mounting surfaces, not so great on the VW). But after parking the plane and heat soaking those shrouds, they do get a little pliable and may take some different shape if not constrained, so I think your steel shrouds as the "hot base" are an excellent solution for the VW... Mark Langford, Huntsville, AL mail: N56ML "at" hiwaay.net website: www.N56ML.com
